How to setup a white label ecommerce solution like Shopfy?

Hi, I have been asked to setup a white label e-commerce solution. What is mean is this:

1) A user signs up to our program.
2) The user points their domain at our servers and upload their logo
3) They get an instant store where they sell the products we have listed
4) For every item they sell on their website, they get a designated % commission

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